1,721,014 research outputs found
UNIMAS Outstanding Online Course Award, 2009
Full text linkUNIMAS Outstanding Online Course Award, 2009 is coferred to Dr. Leaw Chui Pin in recognition of your outstanding use of Morpheus in supporting your teaching.
Organised by Centre for Applied Learning and Multimedia (CALM
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
The role of nutrient-related genes in understanding the saxitoxin production of Alexandrium minutum
Full text linkAlexandrium minutum is a saxitoxins-producring marine dinoflagellate that responsible for paralytic shellfish
poisoning (PSP). It is widely distributed in the tropical and temperate waters with various hydrographic regimes. The
physiological responses of this species to various macronutrients have been studied intensively, but little is known about the regulating mechanism of nutrient uptakes and their roles in saxitoxin production. The effect of varying levels of nitrogen and phosphorous nutrition on the transcriptional responses of a tropical ribotype of A. minutum was investigated in a laboratory setting. The nutrient-related genes, ammonium transporter (AmAmt1), nitrate transporter (AmNrt2), phosphate transporter (AmPiPT1), nitrate reductase (AmNas), glutamine synthetase (AmGSIII) and carbarmoyl phosphate synthase (AmCPSIII) were assembled from Sequence Read Archive (SRA) data set, and later used in the differential gene expression analyzed by qPCR. The results showed that, AmAmt1 was suppressed in excess ammonium-grown culture; conversely AmNrt2 and AmNas were induced. Gene expression of AmAmt1, AmNrt2, AmNas, AmGSIII, AmCPSII and AmPiPT1 was highly induced under P-deficient condition, suggesting that the cells are
scavenging to take up nutrients in the P-stress condition. Gene expression of AmCPSII was well correlated with the
toxin cell quota, suggesting the gene might involve in arginine metabolism and simultaneously increased the toxin
production. Nonetheless, AmGSIII expression might play a role in the stress adaption towards high toxic levels of
ammonium ambient by producing toxins as a counteracting response. The results of this study have provided better
insights into the eco-physiology of A. minutum in relation to the toxin production and its adaptive strategies in
unfavorable environments
Harmful Algal Blooms in Malaysian Waters
Full text linkHarmful algal blooms (HABs) events have been increasingly reported in the country, not only of the frequency and severity
of the events, but also involved more species than previously known. In this paper, a decadal review of HABs events in
Malaysia is summarized. Bloom events caused by harmful dinoflagellate species including the shellfish poisoning events
were highlighted. Paralytic shellfish poisoning (PSP) is no longer restricted to Sabah coasts and Pyrodnium bahamense.
Bloom of Alexandrium minutum was reported for the first time in the Peninsula with six persons hospitalized including
one casualty after consuming the contaminated benthic clams. Algal blooms that are associated with incidence of massive
fish kills have been reported from both east and west coasts of the Peninsula in conjunction to finfish mariculture loses.
The culprits of these bloom events have been identified as the dinoflagellates, Cochlodinium polykrikoides, Neoceratium
furca, Prorocentrum minimum, Noctiluca scintillans and a raphidophyte, Chatonella ovata. In this paper, some of these
HABs species were characterized morphologically and genetically, including their toxicity. Therefore, with the increase of
coastal utilization and eutrophication, prevention, management and mitigation strategies, such as site selection, moving
pens, clay spraying should be adopted to minimize the impact of these natural events
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